Ajay Kumar Mishra

The world is witnessing an unprecedented rise in solid, liquid, and hazardous waste due to rapid urbanization, industrialization, and shifting consumption patterns. Inadequate infrastructure, inefficient segregation, and minimal resource recovery continue to pose critical threats to public health, ecosystems, and climate goals. There is an urgent global need for sustainable, technology-driven solutions that transform waste into a valuable resource. Sustainability in Waste Management: An Engineering Perspective presents a comprehensive framework for integrating environmental engineering, renewable energy, digital innovation, and circular economy principles into modern waste management. It blends theory with real-world applications, drawing insights from diverse regions, including both developed and developing countries. Structured across nine chapters, the book covers: Core concepts such as waste classification, characterization, landfilling, and decentralized wastewater treatment Resource recovery from organic, biomedical, and food waste Renewable-powered systems such as solar dryers and PV-based waste handling Emerging technologies like hydrogen production, energy storage, carbon capture, and AI-enabled waste monitoring The book aligns with key global targets such as the UN Sustainable Development Goals (SDGs) particularly SDG 6 (Clean Water and Sanitation), SDG 7 (Affordable and Clean Energy), and SDG 11 (Sustainable Cities and Communities). Intended for engineers, researchers, urban planners, and policymakers, this book offers scalable, adaptable, and technically sound solutions to modern waste challenges. It aims to catalyze a transition toward cleaner, smarter, and more resilient waste management systems worldwide.

Manufacturing Processes offers a concise overview of essential manufacturing processes, providing readers with a foundational understanding of the methods used to transform raw materials into finished products, covering traditional techniques like casting, forming, and machining, alongside modern methods such as additive manufacturing. It provides both theoretical and practical knowledge to engineering students. Written in a very simple language. Figures for better understanding of tools, equipment, machines and manufacturing setups. Practice test questions.

मौलिकता का भ्रम पाले आकुल अन्तर अपने को अभिव्यक्त कर कम से कम शब्दों में समेट लेना चाहता है पर एक सीमा है, जो असीम होना चाहती है। ससीम और असीम की भी एक मर्यादा है। मर्यादा का अतिक्रमण अराजकता को जन्म देता है। इससे बचते हुए महाभारत की उपलब्धियों और आधुनिक परिवेश में इसकी उपयोगिता संबंधी तथ्यों पर समसामयिक संदृष्टि प्रक्षिप्त करने की कोशिश है। कोशिश तो कोशिश है। प्रयास की एक यात्रा है। इस यात्रा में मैंने जहाँ भी जिस रूप में कुछ पाया उसे ज्यों का त्यों नहीं, आत्म ज्ञान से नहीं, भौतिक परिवेश में भारत की माटी, वनस्पतियों, नदी-तालाब, सरेह सीवान और एक ओर जहाँ अगणित आखर में अभिव्यक्त उत्तुंग शिखरों से संवाद साधने की चेष्टा की है. वहीं पर श्रीकृष्ण के उज्ज्वल चरित्र के साथ परम्परागत व्यास-वाल्मीकि एवं अन्याय शब्द शरीर-धारियों और उनके कैवल्य शरीर से साधनात्मक दृष्टि को अन्तरस्थ भावनाओं के साथ जोड़कर परोसने की कोशिश की है। साधिकार कुछ दावा नहीं कर सकता पर इतना जरूर है कि 'दैवी भावरये वाहकं भारतं भा-रतं भवेत। करोतु निखिलं विश्वम् भयमुक्तं निरामयम् ।। भारत दैवी भाव का संवाहक है। यह ज्योतिर्मय हो उसे सम्पूर्ण विश्व को भयमुक्त और नीरोग बनाये। इसी परिप्रेक्ष्य में महाभारत विश्वकाव्य है। संस्कृत में उल्लिखित अक्षरों में क्षर मानव को अक्षर बनाने का, उस राह में दो कदम चलने चलाने के प्रयास की एक छोटी सी भूमिका है।

Smart materials are used to develop more cost-effective and high-performance water treatment systems as well as instant and continuous ways to monitor water quality. Smart materials in water research have been extensively utilized for the treatment, remediation, and pollution prevention. Smart materials can maintain the long term water quality, availability and viability of water resource. Thus, water via smart materials can be reused, recycled, desalinized and also it can detect the biological and chemical contamination whether the source is from municipal, industrial or man-made waste. The 15 state-of-the-art review chapters contained in this book cover the recent advancements in the area of waste water, as well as the prospects about the future research and development of smart materials for the waste water applications in the municipal, industrial and manmade waste areas. Treatment techniques (nanofiltration, ultrafiltration, reverse osmosis, adsorption and nano-reactive membranes) are also covered in-depth. The chapters are divided into three groups: The first section includes the various carbon nanomaterials (such as carbon nanotubes, mixed oxides) with a focus on use of carbon at nanoscale applied for waste water research. The second section focuses on synthetic nanomaterials for pollutants removal. The third section highlights the bio-polymeric nanomaterials where the authors have used the natural polymers matrices in a composite and nanocomposite material for waste treatment. The large number of researchers working in the area will benefit from the fundamental concepts, advanced approaches and application of the various smart materials towards waste water treatment that are described in the book. It will also provide a platform for the researchers and graduate students to carry out advanced research and understand the building blocks.